refact(frank-zealot): serve gates run on the shared gate library

The three -e gates (runtime, GGUF, mmproj) are require_file calls: the refusal
now names the artifact class, the exact path and the script that produces it.
The seam asserts that observable triple instead of the old sentence order.

tests/frank_zealot_unit.bats

@@ -253,15 +253,20 @@ run_stage() {
 }
 
 @test "the serve script refuses a missing runtime, GGUF or projector" {
+    # The refusal is the shared gate library's: it names the artifact class,
+    # the exact path, and the script that produces it.
     rm -f "$MODEL_DIR/$MM_STUB"
     serve_argv
     [ "$status" -ne 0 ]
-    [[ "$output" == *"frank-zealot: missing"* ]]
+    [[ "$output" == *"frank-zealot:"* ]]
+    [[ "$output" == *"mmproj"*"missing"*"$MM_STUB"* ]]
+    [[ "$output" == *"download-frank-zealot.sh"* ]]
 
     rm -f "$RUNTIME_DIR/bin/llama-server"
     serve_argv
     [ "$status" -ne 0 ]
-    [[ "$output" == *"frank-zealot: missing"* ]]
+    [[ "$output" == *"runtime"*"missing"*"llama-server"* ]]
+    [[ "$output" == *"build-llama-master-cuda.sh"* ]]
 }
 
 @test "the deploy handler gates on binary, GGUF and projector, then MainPID-hardens health" {